Quercus coccinea (Scarlet Oak)


Michael's Opinion

It is a tree tolerant of poor soil conditions and will grow quite easily in Ontario. The autumn colours can be attractive, but I don't see many other strong attributes. It can sometimes be confused with Q. palustris and Q. rubra.

Botanical Information

FamilyFagaceae
GenusQuercus
Speciescoccinea
CategoryWoody
TypeTree (deciduous)
OriginEastern United States of America and southern Canada.
Pronunciation

Details

USDA Hardiness Zone4 - 9
USDA Hardiness Ref.
Canadian Hardiness Zone2a
Canada Hardiness Ref.
RHS Hardiness ZoneH7 - H3
RHS Hardiness Ref.
Temperature (°C)(-32) - (-1)
Temperature (°F)(-25) - 30
Height20-30 m
Spread10-15 m
GrowthMedium
Flowering PeriodApril, May

Description and Growing Information

General DescriptionA medium-large oak with an open, rounded crown and bright red autumn colour. This species has been placed on the IUCN Red List as least concern.
ID CharacteristicThe leaves have deep c-shaped sinuses between the lobes. It has bright red autumn colour.
ShapeSlightly pyramidal when young, round when mature.
LandscapeIt is planted for ornamental purposes (park, street, garden) and sometimes a shade tree. It is fairly popular mainly for its bright red autumn colour.
CultivationSlightly acidic, sandy and well-drained soils in full sun.
PestsSusceptible to oak wilt. Main pests are: oak leafteaters, fall cankerworms, forest tent caterpillars and the gypsy moth.
Notable SpecimensThe University of Western Ontario, London, Ontario, Canada.
HabitatDry upland forests, usually on ridges and slopes at an altitude of approximately 1,500 m.
Bark/Stem DescriptionThe bark is dark gray to dark brown, finely fissured and scaly ridges with reddish-brown twigs.
Flower/Leaf Bud DescriptionOvoid, pointed and hairy, dark reddish-brown, 4-7 mm in length.
Leaf DescriptionLeaves are alternate, simple, oblong or elliptic, with deep-sinuses. They are glossy and smooth on both top and bottom. The top is dark green and the undersides are paler green with small turfs of hairs sometimes appearing in the vein axils, 7-20 x 5-13 cm.
Flower DescriptionMonoecious tree. Males are drooping yellow catkins, 6-8 cm. Females are fewer and appear in axils of new leaves.
Fruit DescriptionAcorn, oval, reddish-brown, 1.2-2.5 cm long, a third to half of it is covered by a cap.
Colour DescriptionIt is glossy dark green in the summer and typically scarlet in autumn (when exposed to cold nights).
Texture DescriptionMedium to coarse.

Photographs